Answer / m.shoaib

Isolator is divise for energiz and disenergize of circuit and circuit breaker is divise for on load triping

Answer / ashokkumar

Isolator is opens the supply line at both ends (In and out
terminals)so the supply line is disconnected at both ends
MCB is open at one side only

__ \__ ----o / o----
In out
MCB Isolator when it opens

Answer / gaurav

Isolator means for two one phase & one neutral & mcb stands
for only one phase.

how determine base of given number like 302/20=12.1

2 Answers  

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In generating stations which we generate current or voltage if it is voltage then how it will convert to current and power?

2 Answers   NIT,

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What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

0 Answers  

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Define resonant frequency?

0 Answers  

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how to calculate the multiplication factor in HT incomer trivector meters

9 Answers   Dalkia, Getco, Gujarat Energy Transmission Corporation Limited GETCO,

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what is the conductor size in 33/11 kv line

5 Answers   Al-Thamer,

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what is the function of a starter in a motor? explain RLC circuit.

14 Answers  

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Why air gap in rotating machines should be small?

3 Answers  

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what is the effect of un-synchronized power.

0 Answers  

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How to Preparation of online test

0 Answers  

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In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

0 Answers  

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We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

0 Answers   Siemens,

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